"We were able to match up the narrow and wide rings exactly so that we can assign the exact calendar dates to the exact rings of every tree."

VOA: standard.2010.04.05

We controlled for other well-known fixed calendar (we call them Gregorian anomalies), notably,day of the week effect, like Monday,January effect, Halloween effect, and none of those factors explained results.

VOA: standard.2010.08.05